Parallel cardiac and vascular adaptation in hypertension

Area of Science:

• Cardiovascular Medicine
• Vascular Biology
• Hypertension Research

Background:

• Vascular damage in hypertension contributes to complications.
• Limited knowledge exists on arterial geometry and function in uncomplicated hypertension.
• Relation between arterial changes and left ventricular hypertrophy is unclear.

Purpose of the Study:

• To investigate in vivo arterial geometry and function in uncomplicated hypertension.
• To explore the relationship between arterial changes and left ventricular hypertrophy.

Main Methods:

• Ultrasound assessed common carotid artery (CCA) wall thickness and diameter in 43 hypertensive and 43 normotensive subjects.
• Vascular stiffness estimated from carotid pressure waveforms.
• Echocardiography assessed left ventricular (LV) size and function.

Main Results:

• Hypertensive patients showed increased LV and CCA wall thicknesses and LV mass.
• 28% of hypertensive patients had increased carotid intimal-medial thickness.
• Vascular stiffness was significantly increased in hypertensive patients despite similar pulse pressures.

Conclusions:

• Uncomplicated hypertension is associated with geometric and functional changes in the CCA.
• These carotid artery changes parallel alterations observed in the left ventricle.
• The contribution of these vascular changes to cardiovascular complications in hypertension remains to be determined.